the reason for your question is because the centralization exchange (cex) first appeared before the Decentralization Exchange (dex), if if first the DEX appeared first I am sure many people would prefer DEX over CEX now,
if DEX is already many and famous then I'm sure many people will switch to DEX later.
DEXs have been around for awhile, but they've had 2 major setbacks:
- Inconvenience (i.e. having to download individual blockchains)
- Low volume (which, in turn, makes jumping through inconvenient tech hurdles not worth it for many)
The table has begun to turn.
In one of many examples, Stakenet intends to use its MN network to host individual chains (convenience) and it will employ a DEX Aggregator to pool multiple DEX orderbooks together (volume).
We're not there just yet, but the water is about to boil. Might as well ask everyone what kind of coffee or tea they're having.